package com.jie.reggie.controller;

import com.jie.reggie.commen.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: 曾豪杰
 * @Date: 2022/09/02/17:28
 * @Description:
 */
@Slf4j
@RestController
@RequestMapping("/common")
public class CommenController {
    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
        //file是一个临时文件，会自动删除
        log.info(file.toString());
        //获取原始文件名
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //使用uuid重新生成
        String fileName= UUID.randomUUID().toString()+ suffix;
        //创建对象，创建目录
        File file1=new File(basePath);
        if(!file1.exists()){
            file1.mkdirs();
        }

        try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){


        try {
            //输入流，读取文件
            FileInputStream fileInputStream=new FileInputStream(new File(basePath+name));
            //输出流，回写，游览器展示
            ServletOutputStream outputStream=response.getOutputStream();

            response.setContentType("image/jpeg");
            int len=0;
            byte[] bytes=new byte[1024];
            while ((len=fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
            //关闭资源
            outputStream.close();
            fileInputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
